Hi Pete, My experience regarding segmentation in EZNEC (NEC-2) with even simple Yagis has been similar to LBs. I normally set the frequency to at least 3 times the operating frequency and then do the
Hi Ed, I'm sorry. But I must take issue with one of your statements. Please note I'm not taking issue with the advice specific to this particular case. Just the one explanatory sataement. To: <antenn
Hi Cecil, With a 2KW minimum rating for the rotary joint, you might not want to specify a type "N" connector. Depending on what frequency you plan to operate this system on, either a PL259 or a 7/16"
Hi Mike, I think I can help you out. As you have already discovered, your element lengths are far too short for operation at 7.05 MHz. I have been modeling 40 meter 3 element antennas for some time n
Hi Mike, You can match a delta loop directly to 50 ohms by operating it a bit "squashed". Doing this has a number of benefits. You get a bit more gain (the veritcal radiators are a bit farther apart)
Hi Robert, To: <antennaware@contesting.com> If you are tuning the system with a tuner, I wouldn't worry too much about the tower to wire interaction. If the tower isn't near resonance on 80 meters, t
Hi Igor, To: <antennaware@contesting.com> Why not? It is closer to the roof and farther from the ground. Either or both of those changes may easily have caused the change you observe. What gives you
Hi Pat, There is a voltage loop a the ends of the antenna whether it is resonant or not. The thing that creates the voltage loop at the end is the fact that the wire stops there. There is no place fo
Dave, Your data are quite interesting. Can you tell me what the configuration of the other elements was while you were measuring the self impedance of each one? Were they open circuited, grounded, re
Dave, Thanks for undertaking all this work and publishing the results. Since it does not appear to be due to coupling to the open circuited elements, the remaining disparity between expected element
I'm looking for the correct conductor constants to put into the models for thinwall galvanized EMT conduit. It must be significantly different from either copper or aluminum. Either the information o
Does anyone have or know of any single conductor diameter equivalences to use in models of system involving towers? I don't want to use up all the pulses in short tower members and cross bracing. I'm
Hi John, Thanks for the reply. I'll compare that result with the results of a formula I just got out of the Antenna Engineering Handbook 3rd ed. Basically, they have e fudge factor to use depending o
Hello... Is this thing on? I thought I subscribed to this list months ago but have seen no traffic. Is it just me? Or is it really this quiet? 73, Eric n7CL -- FAQ on WWW: http://www.contesting.com/a